> > But I still think the loose belt is a better idea. But get rid of the > separate and expensive ball bearings and make the armature itself > eccentric, wrapping it in a dual row, printed in plastic bearing using > crosman bb's for balls is working moderately well for me. And it will > be strongest when the splines are worn to fit each other. What I am fine > tuning right now, and may have to resort to a smaller nozzle to print > it, is a new preloaded fit that when broke in, still has zero backlash. > But one of them has now been running on my kitchen counter for a month > at about 20 rpm output, 600 at the motor, with no noise and no breakage, > with a 1NM motor turning it. But it can't be done in PLA, must have the > more flexible PETG. And that eliminates any printer not using at least > an E3D V6 or better hot end, I now have 5 printers tossed in the corner, > which claimed to be able to use PETG. Once maybe, but not a full spool > of it. >
Hi gene, I hope you're doing well. What problems did you have with your printers and PETG? Have you tried the Ender 5 PRO? I have one of those and had moderate success with PETG (didn't worked with it too much) but I use it mostly with ABS to create casting patterns because it is easy to sand and smooth with acetone. The extruder is not direct but it's all metal and the hotend reaches 260º. I just changed the firmware to the latest Marlin and activated the manual mesh levelling to get better adhesion. Also I made a quick enclosure for it with polycarbonate and put a resistor inside to heat the chamber to 60º C. I'm priting ABS with a 1 mm nozzle pretty well. Tried nylon and had some success with small parts but horrible warping with large parts (also at 60º C on the chamber). El jue, 26 ago 2021 a las 23:35, Gene Heskett (<ghesk...@shentel.net>) escribió: > On Thursday 26 August 2021 17:57:09 Ralph Stirling wrote: > > > This might inspire some of you. > > > > https://www.wittenstein-us.com/zero-backlash-galaxie-gearbox/ > > > > -- Ralph > > That looks like an excedrin headache to try and print. > > IMO, this is designed to get around any patents that might still exist, > and would need far more precise a make and high priced steels. > > But I still think the loose belt is a better idea. But get rid of the > separate and expensive ball bearings and make the armature itself > eccentric, wrapping it in a dual row, printed in plastic bearing using > crosman bb's for balls is working moderately well for me. And it will > be strongest when the splines are worn to fit each other. What I am fine > tuning right now, and may have to resort to a smaller nozzle to print > it, is a new preloaded fit that when broke in, still has zero backlash. > But one of them has now been running on my kitchen counter for a month > at about 20 rpm output, 600 at the motor, with no noise and no breakage, > with a 1NM motor turning it. But it can't be done in PLA, must have the > more flexible PETG. And that eliminates any printer not using at least > an E3D V6 or better hot end, I now have 5 printers tossed in the corner, > which claimed to be able to use PETG. Once maybe, but not a full spool > of it. > > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > If we desire respect for the law, we must first make the law respectable. > - Louis D. Brandeis > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
